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This research work aims to explore the potential of latent heat thermal energy storage (LHTES) using a prototype of four-pass vertical heat exchangers. The LHTES system incorporates the energy storage mode as paraffin wax savE® OM-42 (make: PLUSSTM) and for the heat transfer liquid water is used. Both numerical simulations using ANSYS Fluent and for the analysis of the influence of heat exchanger design on the charging characteristics of the phase change material (PCM), experimental studies were performed. The 3D models of the four-pass heat exchangers were created, and simulations were performed in the transient state to investigate the impact of orientation, number of passes, and relative position of the tube, i.e., heat transfer fluid (HTF) tubes. Varying the HTF inlet temperatures allowed for studying its effect on the melting characteristics. Key parameters under consideration included the melting time of PCM during the charging cycle, the average liquid fraction of PCM, middling value temperature for the PCM domain, inlet and outlet temperatures of the HTF, and visual observations of melting and solidification patterns during charging. The computational results emphasized the significant roles of HTF inlet temperature, the relative position of the HTF tubes, and the orientation of heat exchanger (HEX), affecting the time of complete PCM melting and the energy storage rate.

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Comprehensive Investigation of a Four-Pass Latent Heat Thermal Energy Storage System with Different Geometric and Flow Configurations: A Numerical and Experimental Analysis

  • 会议论文

  • 发表日期：

    2025年

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  • Pushpendra Kumar Shukla,
  • Jaideep Shukla,
  • Ketan Arora,
  • P. Anil Kishan

摘要

This research work aims to explore the potential of latent heat thermal energy storage (LHTES) using a prototype of four-pass vertical heat exchangers. The LHTES system incorporates the energy storage mode as paraffin wax savE® OM-42 (make: PLUSSTM) and for the heat transfer liquid water is used. Both numerical simulations using ANSYS Fluent and for the analysis of the influence of heat exchanger design on the charging characteristics of the phase change material (PCM), experimental studies were performed. The 3D models of the four-pass heat exchangers were created, and simulations were performed in the transient state to investigate the impact of orientation, number of passes, and relative position of the tube, i.e., heat transfer fluid (HTF) tubes. Varying the HTF inlet temperatures allowed for studying its effect on the melting characteristics. Key parameters under consideration included the melting time of PCM during the charging cycle, the average liquid fraction of PCM, middling value temperature for the PCM domain, inlet and outlet temperatures of the HTF, and visual observations of melting and solidification patterns during charging. The computational results emphasized the significant roles of HTF inlet temperature, the relative position of the HTF tubes, and the orientation of heat exchanger (HEX), affecting the time of complete PCM melting and the energy storage rate.